Qt、WIndows 和 OpenSSL - 无法调用未解析的函数 xyz

Question

我最近在运行Qt 5.9.1的Windows 10机器上安装了ArcGIS Runtime SDK。尝试使用其中一个 ArcGIS 模板构建简单的QWidget应用程序时，出现以下错误：

qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_CTX_new
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_library_init
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_CTX_new
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_library_init
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_CTX_new
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_library_init
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_CTX_new
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_library_init
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function SSLv23_client_method
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_CTX_new
qt.network.ssl: QSslSocket: cannot call unresolved function SSL_library_init
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error
qt.network.ssl: QSslSocket: cannot call unresolved function ERR_get_error

这个问题似乎很常见，但是大多数Google结果都为Linux系统提供了答案。

我做了以下工作：

• 下载并安装了OpenSSL（来自GnuWin32 OpenSSL）
• 跨libeay32.dll复制并libssl32.dll到生成文件夹
• 将包含路径添加到 Qt pro 文件中
• 已验证network是否在pro文件的QT +=配置部分中

然而，以上这些都没有产生任何影响。我正在运行 MSVC 2015 32 位套件。

Answer 1

您必须将静态库添加到项目中。

找出libeay32.lib和libssl32.lib并将它们添加到您的项目中。

指

http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html

Answer 2

我认为你需要这样一个两个dll文件：libeay32.dll和ssleay32.dll.我使用与你相同的版本qt，所以你可以从这里下载它们或直接从这里获取zip（这对我有用）。

Qt使用的不同版本的openssl lib，所以如果你不确定，你应该使用下面的静态函数在你的代码中测试它：

QSslSocket::sslLibraryBuildVersionString();

Answer 3

如果其他人遇到这个问题，请注意，从版本1.1.0开始，OpenSSL已将其库名称从：

• libeay32.dll -> libcrypto.dll
• ssleay32.dll -> libssl.dll

因此，您需要将这两个文件包含在项目中，以便 QSsl 函数正常工作。